Kohler ECH630 Troubleshooting
| Engine Model: Kohler Command Pro ECH630 EFI |
| Engine Type: 4-cycle V-Twin cylinder horizontal shaft air-cooled gasoline |
| Total Displacement: 42.4 cu.in (694 cc) |
| Rated Engine Power: 19 Hp (14.2 kW) at 3600 rpm |
| Fuel System Type: Electronic fuel injection (EFI) |
____________________________________________________________________________________
| Engine difficult to start or will not start |
No fuel in fuel tank - Fill it up.
Low-quality gasoline - Change fuel.
Water or air in fuel system - Remove air or water from system.
Spark plug wiring connection is defective - Inspect the spark plug wire connection, replace or repair.
Spark plug is defective - Change spark plug.
Clogged fuel filter - Install new filter.
Brake pedal not pushed down - Push the brake pedal down.
Loose or defective crankshaft position sensor - Change as required.
Throttle position sensor defective or incorrectly set - Throttle position sensor must be adjusted or replaced.
Lack of system voltage - Check voltage regulator and change as required.
Dirty or damaged fuel injectors - Clean or install new fuel injectors.
Clogged fuel lines - Fuel lines need to be cleaned.
Engine has low compression - Check cylinder block and replace defective parts.
Throttle cable is adjusted incorrectly or damaged - Change cable or adjust correctly.
| Engine runs intermittently |
Cooling fins are blocked - Need to clean or wash.
Defective ignition system - Check ignition and replace faulty components.
Throttle cable is stuck or faulty - Change or service the cable.
Dirty air filter element - Service or replace air filter.
Fuel pump is clogged or faulty - Inspect fuel pump and change as required.
Fuel injectors are dirty or defective - Test fuel injectors and change if necessary.
Restricted fuel lines - Clean fuel lines.
Throttle position sensor faulty or incorrectly set - Throttle position sensor must be adjusted or replaced.
| Engine starts and stops immediately |
Defective spark plug - Install new spark plug.
Defective ignition coil - Install a new ignition coil.
Damaged or weak valve springs - New valve springs need to be installed.
Valves sticking - Service the valves.
Fuel filter is dirty - Install new filter.
Air filter element is plugged - Clean or replace air filter.
Dirt in the fuel lines - Fuel lines must be clean.
Fuel injectors are clogged or faulty - Service or change fuel injectors.
Incorrect governor setting - Adjust governor correctly.
Engine oil level is insufficient - Need to add engine oil.
Engine is running overloaded - Load reducing is recommended.
Clogged cooling fins - Wash or clean as required.
Wrong ignition timing - Ignition timing needs to be adjusted correctly.
Wrong valve setting - Set the valves properly.
| Abnormal engine noise or knocking |
Stale or low octane fuel - Use correct gasoline.
Engine overloaded - Reduce engine load.
Engine oil insufficient - Checking oil level and add if necessary.
Low idle speed set incorrectly - Adjustment required.
Dirty or damaged fuel pump - Check fuel pump and change if required.
Main bearings or crankshaft failure - Install new parts as as required.
Excessive valve clearance - Adjust to proper valve clearance.
Piston rings or cylinder bore are worn - Change defective components.
Plugged air filter - Replace or clean air filter.
Dirty or faulty fuel pump - Test fuel pump and change if necessary.
Fuel lines are clogged - Clean fuel lines.
Incorrect governor adjustment - Adjust governor as required.
One fuel injector malfunction - Check fuel injector and change if required.
Defective ignition - Check ignition and replace faulty components.
Damaged cylinder-head gasket - Change cylinder head gasket.
Valves are stuck or burned - Replace or clean valves.
Bent or worn push rod - Push rod should be replaced.
Worn cylinder block parts - Change defective components.
Dirty oil filter element - Service or replace oil filter.
| Engine using too much gasoline |
Insufficient choke opening - Inspect choke cable and adjust as required.
Clogged or damaged fuel injectors - Inspect fuel injectors and change as required.
Loose or faulty spark plug - Replace or tighten spark plug.
Valves are stuck, worn, or burned - Clean or change valves.
Rings, sleeve, or piston are damaged - Change defective parts.
Valve clearance is incorrect - Adjustment procedure required.
| Excessive oil consumption |
Damaged gaskets or seals - To repair leaks, replace worn parts.
Valve guides or stems are damaged - Replace defective valves.
Worn or stuck piston rings - Piston rings need to be replaced.
Piston or cylinder liner is worn - Inspect liner and piston, replace as necessary.
Plugged breather hose or pipe - Change or clean.
____________________________________________________________________________________
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
| Industrial Engines Technical Specifications |
